\begin{tabular}{lcccc} \hline
 & (1) & (2) & (3) & (4) \\
VARIABLES & Orig. EI & New EI & Orig. SI & New SI \\ \hline
 &  &  &  &  \\
PGI EA & 0.0196 & 0.00449 & -0.118*** & -0.140*** \\
 & (0.0318) & (0.0342) & (0.0327) & (0.0338) \\
Sex of twin & -0.166*** & -0.0998** & -0.132*** & 0.0232 \\
 & (0.0454) & (0.0480) & (0.0451) & (0.0450) \\
Constant & 0.0521** & -0.000906 & 0.0321 & -0.0472** \\
 & (0.0242) & (0.0254) & (0.0244) & (0.0240) \\
 &  &  &  &  \\
Observations & 3,022 & 2,674 & 3,182 & 3,032 \\
R-squared & 0.634 & 0.637 & 0.629 & 0.637 \\
 Twin pair FE & YES & YES & YES & YES \\ \hline
\multicolumn{5}{c}{ Robust standard errors in parentheses} \\
\multicolumn{5}{c}{ *** p$<$0.01, ** p$<$0.05, * p$<$0.1} \\
\end{tabular}
